This back-up power generator has a 14 hp Briggs & Stratton OHV Vanguard engine. Built for durability, the engine has cast iron cylinder sleeves and low oil protection. The overhead valve design is also smoother running and quieter. Starts easily using the pull cord or push button electric start (battery not included). Rated for 8,000 continuous watts, the advanced brushless alternator provides less current distortion and longer life without the need for brush replacement. The 7-gallon tank provides 5.5 hours of run time at full load and 8.4 hours at half load. One year limited warranty. Includes generator and engine oil.